Patents by Inventor Weihao Xu

Weihao Xu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20250140284
    Abstract: The present embodiments relate to methods for manufacturing a write head that prevents seamlines being present in a main pole. An oxide layer can be disposed over a Ruthenium (Ru) layer over a side shield over a first side of a trench formed in the side shield. A photo resist patterning process can clean the oxide layer and expose a portion of the Ru layer for main pole electroplating. The main pole can be electroplated in the trench such that the main pole contacts the Ru layer at a second side of the trench. The photo resist can be stripped and a planarization process can planarize the side shield and main pole surface.
    Type: Application
    Filed: October 27, 2023
    Publication date: May 1, 2025
    Inventors: Feiyue Li, Weihao Xu, Wenli Yang, Chaokang Gu, Weisheng Hu, Kaiyang Niu
  • Publication number: 20250138432
    Abstract: The present embodiments relate to MP electroplating processes that eliminate seamlines using a bottom-up MP electroplating process. The MP electroplating process can include, after disposing the side shield, depositing a Ru layer as a side gap layer. The process can further include depositing an insulator layer. The MP bottom-up electroplating process can further include performing an ion-beam-etch (IBE) process to clean the insulator at bottom of the trench. After resist patterning, the electroplating process can include electroplating the MP on Ru seed only from the bottom of the trench. The seamline in the MP can be eliminated in the bottom-up MP electroplating process.
    Type: Application
    Filed: October 27, 2023
    Publication date: May 1, 2025
    Inventors: Cherng-Chyi Han, Feiyue Li, Weihao Xu, Weisheng Hu, Chaokang Gu, Ittetsu Kitajima, Kaiyang Niu
  • Patent number: 12288568
    Abstract: A method of fabricating a near field transducer (NFT) in a thermally assisted magnetic recording (TAMR) head is disclosed. In some embodiments, the method includes: depositing a dielectric layer and a template layer on a waveguide core; patterning the template layer to form a template; depositing an Au NFT layer; planarizing the Au NFT layer to generate a planar layer; depositing an upper NFT layer; applying a peg patterning mask; etching the upper NFT layer and the planar layer that includes the Au NFT layer; removing the template; and depositing a dielectric material and planarizing an upper surface that includes the upper NFT layer.
    Type: Grant
    Filed: April 16, 2024
    Date of Patent: April 29, 2025
    Assignee: Headway Technologies, Inc.
    Inventors: Weihao Xu, Shengyuan Wang, Dingchuan Xue
  • Publication number: 20250095672
    Abstract: The present embodiments relate to a write head design with a patterned hot seed (HS). Particularly, the HS can be patterned as part of a multi-step patterning process that can partially or completely remove portions of the HS at multiple sides to form various designs. For example, the HS can have a two-step cliff design, etching multiple steps around an un-patterned center portion, and a flared angle. The designs of the patterned HS can improve write head performance.
    Type: Application
    Filed: September 18, 2023
    Publication date: March 20, 2025
    Inventors: Haowen Ren, Weihao Xu, Yuxuan Xiao, Shehrin Sayed, Yue Liu, Yan Wu, Yuhui Tang
  • Publication number: 20250097486
    Abstract: Provided are a method and system for controlling interactive live streaming co-hosting, a device, and a medium. The method includes acquiring a first interactive image and receiving a mirror interactive image of a second terminal by a first terminal, where the first terminal and the second terminal are in a live streaming co-hosting state, and the mirror interactive image of the second terminal is obtained by performing mirror processing on a second interactive image of the second terminal; and combining the first interactive image and the mirror interactive image by the first terminal to obtain a target interactive image.
    Type: Application
    Filed: August 7, 2024
    Publication date: March 20, 2025
    Inventors: Wanhong WANG, Yalou WANG, Jiahuan HUANG, Yong ZHU, Yaxin LI, Xin CHE, Jiacheng LIU, Zihao ZHANG, Yuanyuan WANG, Zheqi QU, Weihao XU, Jianping CHEN
  • Publication number: 20240363140
    Abstract: The present embodiments relate to a perpendicular magnetic recording (PMR) write head with an STO element and configured to direct an electric current between elements of the write head. A first example embodiment describes a perpendicular magnetic recording (PMR) write head. The PMR write head can include a main pole comprising a tip portion disposed adjacent to an air bearing surface (ABS) and is configured to interact with a magnetic recording medium. The PMR write head can also include a spin torque oscillator (STO) element disposed adjacent to the main pole. The PMR write head can also include a side shield layer with a portion of the side shield layer disposed adjacent to the ABS. The PMR write head can also include a metallic side gap layer disposed between the main pole and the side shield layer.
    Type: Application
    Filed: July 10, 2024
    Publication date: October 31, 2024
    Inventors: Kei Hirata, Kowang Liu, Yue Liu, Jiun-Ting Lee, Weihao Xu
  • Publication number: 20240347072
    Abstract: The present embodiments relate to a PMR write head with a trailing shield that comprises a FeCoNiM composition. The FeCoNiM composition can be formed via an electroplating process by adding Fe2+, Co2+, Ni2+ and a transition metal salt to an aqueous solution comprised of other additives in an electroplating cell that has an Ni or Co as the anode. The plated HD magnetic material as the trailing shield in a PMR writer can minimize a wide area track erasure (WATE). Further, a high moment high damping shield can lower bit error rate (BER) and increase aerial density capability (ADC) of the write head.
    Type: Application
    Filed: April 2, 2024
    Publication date: October 17, 2024
    Inventors: Xiaomin Liu, Wenjie Chen, Yue Liu, Weihao Xu, Yuhui Tang, Feiyue Li
  • Publication number: 20240312483
    Abstract: The present embodiments relate to a perpendicular magnetic recording (PMR) write head with a self-aligned side gap insulator. A self-aligned SG oxide insulator can reduce or eliminate the current from MP to SS. The SG insulator can force the writer current to go through a writer gap and leading gap, which can improve ATI and TPI performance.
    Type: Application
    Filed: March 16, 2023
    Publication date: September 19, 2024
    Inventors: Yu-Hsia Chen, Weihao Xu, Jiun-Ting Lee, Weisheng Hu, Yuhui Tang, Yue Liu
  • Patent number: 12088857
    Abstract: Provided are a method and system for controlling interactive live streaming co-hosting, a device, and a medium. The method for controlling interactive live streaming co-hosting includes acquiring a first interactive image and receiving a mirror interactive image of a second terminal by a first terminal, where the first terminal and the second terminal are in a live streaming co-hosting state, and the mirror interactive image of the second terminal is obtained by performing mirror processing on a second interactive image of the second terminal; and combining the first interactive image and the mirror interactive image by the first terminal to obtain a target interactive image.
    Type: Grant
    Filed: December 29, 2022
    Date of Patent: September 10, 2024
    Assignee: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD.
    Inventors: Wanhong Wang, Yalou Wang, Jiahuan Huang, Yong Zhu, Yaxin Li, Xin Che, Jiacheng Liu, Zihao Zhang, Yuanyuan Wang, Zheqi Qu, Weihao Xu, Jianping Chen
  • Publication number: 20240296866
    Abstract: The present embodiments relate to a heat-assisted magnetic recording (HAMR) write head with a NFT bi-layer structure with a bottom taper, which can be applied to one or both layers of the two layers. A heat-assisted magnetic recording (HAMR) write head can include a main pole including a tip portion configured to interact with a magnetic recording medium at an air-bearing surface (ABS). The HAMR write head can further include a near-field transducer (NFT) that includes a dielectric waveguide, a plasmon generator (PG) layer, and a second layer. The second layer can include a thermo-mechanically stable material disposed adjacent to the PG layer. Further, the PG layer and the second layer can form a taper angle relative to the ABS ranging between 30 and 60 degrees.
    Type: Application
    Filed: May 15, 2024
    Publication date: September 5, 2024
    Inventors: Weihao Xu, Tobias Maletzky
  • Patent number: 12073857
    Abstract: The present embodiments relate to a perpendicular magnetic recording (PMR) write head with an STO element and configured to direct an electric current between elements of the write head. A first example embodiment describes a perpendicular magnetic recording (PMR) write head. The PMR write head can include a main pole comprising a tip portion disposed adjacent to an air bearing surface (ABS) and is configured to interact with a magnetic recording medium. The PMR write head can also include a spin torque oscillator (STO) element disposed adjacent to the main pole. The PMR write head can also include a side shield layer with a portion of the side shield layer disposed adjacent to the ABS. The PMR write head can also include a metallic side gap layer disposed between the main pole and the side shield layer.
    Type: Grant
    Filed: February 15, 2023
    Date of Patent: August 27, 2024
    Assignee: Headway Technologies, Inc.
    Inventors: Kei Hirata, Kowang Liu, Yue Liu, Jiun-Ting Lee, Weihao Xu
  • Publication number: 20240274152
    Abstract: The present embodiments relate to a perpendicular magnetic recording (PMR) write head with an STO element and configured to direct an electric current between elements of the write head. A first example embodiment describes a perpendicular magnetic recording (PMR) write head. The PMR write head can include a main pole comprising a tip portion disposed adjacent to an air bearing surface (ABS) and is configured to interact with a magnetic recording medium. The PMR write head can also include a spin torque oscillator (STO) element disposed adjacent to the main pole. The PMR write head can also include a side shield layer with a portion of the side shield layer disposed adjacent to the ABS. The PMR write head can also include a metallic side gap layer disposed between the main pole and the side shield layer.
    Type: Application
    Filed: February 15, 2023
    Publication date: August 15, 2024
    Inventors: Kei Hirata, Kowang Liu, Yue Liu, Jiun-Ting Lee, Weihao Xu
  • Patent number: 12014758
    Abstract: The present embodiments relate to a heat-assisted magnetic recording (HAMR) write head with a NFT bi-layer structure with a bottom taper, which can be applied to one or both layers of the two layers. A heat-assisted magnetic recording (HAMR) write head can include a main pole including a tip portion configured to interact with a magnetic recording medium at an air-bearing surface (ABS). The HAMR write head can further include a near-field transducer (NFT) that includes a dielectric waveguide, a plasmon generator (PG) layer, and a second layer. The second layer can include a thermo-mechanically stable material disposed adjacent to the PG layer. Further, the PG layer and the second layer can form a taper angle relative to the ABS ranging between 30 and 60 degrees.
    Type: Grant
    Filed: February 7, 2023
    Date of Patent: June 18, 2024
    Assignee: Headway Technologies, Inc.
    Inventors: Weihao Xu, Tobias Maletzky
  • Patent number: 11978488
    Abstract: The present embodiments relate to a PMR write head with a trailing shield that comprises a FeCoNiM composition. The FeCoNiM composition can be formed via an electroplating process by adding Fe2+, Co2+, Ni2+ and a transition metal salt to an aqueous solution comprised of other additives in an electroplating cell that has an Ni or Co as the anode. The plated HD magnetic material as the trailing shield in a PMR writer can minimize a wide area track erasure (WATE). Further, a high moment high damping shield can lower bit error rate (BER) and increase aerial density capability (ADC) of the write head.
    Type: Grant
    Filed: April 11, 2023
    Date of Patent: May 7, 2024
    Assignee: Headway Technologies, Inc.
    Inventors: Xiaomin Liu, Wenjie Chen, Yue Liu, Weihao Xu, Yuhui Tang, Feiyue Li
  • Patent number: 11699461
    Abstract: The present embodiments relate to a thermally-assisted magnetic recording (TAMR) head. A magnetic assist current can be applied to the TAMR head to assist in reducing timing jitter as the TAMR head interacts with a magnetic recording material. The TAMR head can include a main write pole including a tip portion and configured to direct a magnetic field for interacting with a magnetic recording medium. The TAMR head can include a laser diode to heat the magnetic recording medium and a dynamic fly height (DFH) heating element for dynamically controlling a height of the main write pole. The heating element can be of a parallel bias circuit that directs a direct current (DC) bias current flow along an electrical path from the magnetic yoke element to the tip portion of the main write pole adjacent to an air bearing surface (ABS).
    Type: Grant
    Filed: April 29, 2022
    Date of Patent: July 11, 2023
    Assignee: Headway Technologies, Inc.
    Inventors: Bogdan Florin Valcu, Tobias Maletzky, Weihao Xu, Alain Truong, Yue Liu
  • Publication number: 20230134623
    Abstract: Provided are a method and system for controlling interactive live streaming co-hosting, a device, and a medium. The method for controlling interactive live streaming co-hosting includes acquiring a first interactive image and receiving a mirror interactive image of a second terminal by a first terminal, where the first terminal and the second terminal are in a live streaming co-hosting state, and the mirror interactive image of the second terminal is obtained by performing mirror processing on a second interactive image of the second terminal; and combining the first interactive image and the mirror interactive image by the first terminal to obtain a target interactive image.
    Type: Application
    Filed: December 29, 2022
    Publication date: May 4, 2023
    Inventors: Wanhong WANG, Yalou Wang, Jiahuan Huang, Yong Zhu, Yaxin Li, Xin Che, Jiacheng Liu, Zihao Zhang, Yuanyuan Wang, Zheqi Qu, Weihao Xu, Jianping Chen
  • Patent number: 11410688
    Abstract: A thermally-assisted magnetic recording head includes a medium facing surface, a main pole, a waveguide, and a plasmon generator. A second metal layer of the plasmon generator includes a second front end facing the medium facing surface. A third metal layer of the plasmon generator includes a narrow portion located on the second metal layer. The narrow portion includes a front end face located in the medium facing surface and configured to generate near-field light from a surface plasmon, and a rear end opposite the front end face. The rear end is located farther from the medium facing surface than is the second front end.
    Type: Grant
    Filed: June 15, 2021
    Date of Patent: August 9, 2022
    Assignee: HEADWAY TECHNOLOGIES, INC.
    Inventors: Yoshitaka Sasaki, Hiroyuki Ito, Shigeki Tanemura, Hironori Araki, Yoji Nomura, Yukinori Ikegawa, Weihao Xu
  • Patent number: 11315597
    Abstract: A plasmon generator (PG) is formed between a waveguide and main pole, and has a front portion (Au/Rh bilayer) wherein the upper Rh layer has a peg shape at an air bearing surface (ABS), and a tapered backside that is separated from a PG back portion by a dielectric spacer. The lower Au layer has a front side recessed from the ABS and curved sides self-aligned with the Rh layer sides. A key feature is that the back section of lower Au layer curved side forms a smaller angle with a plane aligned orthogonal to the ABS than a front section thereof thereby selectively enabling a deformation of the back end of the Au layer during a heat treatment to >300° C. at the wafer level. Accordingly, the front end of the lower Au layer is densified and provides an improved heat sink to improve reliability and area density capability (ADC).
    Type: Grant
    Filed: January 25, 2021
    Date of Patent: April 26, 2022
    Assignee: Headway Technologies, Inc.
    Inventors: Koji Shimazawa, Weihao Xu, Ken Fujii
  • Patent number: 11011192
    Abstract: An optically shielded (thermally assisted magnetic recording (TAMR) head comprises a perpendicular magnetic recording (PMR) write head and a near-field transducer (NFT) having an emerging peg at the air-bearing surface (ABS). Self-aligned optical side shields (SA-OSS) are formed using a self-aligning process that positions the shields symmetrically relative to the emergent peg of the NFT. As a result of the symmetric positioning the down-track and cross-track near-field and near-field gradients are significantly sharpened.
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: May 18, 2021
    Assignee: Headway Technologies, Inc.
    Inventors: Weihao Xu, Ittetsu Kitajima, Cherng-Chyi Han, Xuhui Jin, Weisheng Hu, Ethan Lo
  • Patent number: 10872628
    Abstract: A near field transducer (NFT) is formed between a waveguide and main pole at an air bearing surface (ABS). The NFT includes a rod-like front portion (PG1) and a substantially triangular shaped back portion (PG2) with a dielectric separation layer therebetween. PG1 is formed on a first dielectric layer with thickness t1 and refractive index (RI1) while PG2 is on a second dielectric layer with thickness t2 and having refractive index (RI2) where t1>t2, and RI1>RI2 while PG1 has a tapered backside at angle 45+15 degrees to promote efficient energy transfer from PG2 to PG1 and reduce NFT heating. A dielectric layer that induces poor adhesion with PG1 may be inserted between below PG1 at the ABS to cause Au recession to occur at the PG1 leading side thereby preventing voids at the PG1 trailing side and ensuring good ADC performance.
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: December 22, 2020
    Assignee: Headway Technologies, Inc.
    Inventors: Koji Shimazawa, Weihao Xu